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Debt and Credit Facilities (Summary of Debt Obligations) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Apr. 02, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Fair Value	$ 1,432,018		$ 974,714
Carrying Value	$ 1,382,890		991,127
3.600% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.60%
3.450% Senior Notes due 2027
Debt Instrument [Line Items]
Stated interest rate	3.45%
3.700% Senior Notes due 2025
Debt Instrument [Line Items]
Stated interest rate	3.70%
5.750% Senior Notes due 2020
Debt Instrument [Line Items]
Stated interest rate	5.75%
4.750% Senior Notes due 2025 (DaVinciRe)
Debt Instrument [Line Items]
Stated interest rate	4.75%
Senior Notes | 3.600% Senior Notes due 2029
Debt Instrument [Line Items]
Stated interest rate		3.60%
Senior Notes | 3.600% Senior Notes due 2029 | RenaissanceRe Finance, Inc.
Debt Instrument [Line Items]
Fair Value	$ 409,760		0
Carrying Value	391,016		0
Senior Notes | 3.450% Senior Notes due 2027 | RenaissanceRe Finance, Inc.
Debt Instrument [Line Items]
Fair Value	304,620		283,680
Carrying Value	296,043		295,797
Senior Notes | 3.700% Senior Notes due 2025 | RenaissanceRe Finance, Inc.
Debt Instrument [Line Items]
Fair Value	311,763		292,557
Carrying Value	297,871		297,688
Senior Notes | 5.750% Senior Notes due 2020 | RenaissanceRe Finance, Inc.
Debt Instrument [Line Items]
Fair Value	255,650		255,938
Carrying Value	249,766		249,602
Senior Notes | 4.750% Senior Notes due 2025 (DaVinciRe) | DaVinciRe Holdings Ltd.
Debt Instrument [Line Items]
Fair Value	150,225		142,539
Carrying Value	$ 148,194		$ 148,040

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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